Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N+ ion irradiation.
Nanotechnology
; 31(28): 285703, 2020 Apr 24.
Article
en En
| MEDLINE
| ID: mdl-32244241
ABSTRACT
In this work we apply N+ ion irradiation on vertically aligned carbon nanotube (VACNT) arrays in order to increase the number of connections and joints in the CNT network. The ions energy was 50 keV and fluence 5 × 1017 ions cm-2. The film was 160 µm thick. SEM images revealed the ion irradiation altered the carbon bonding and created a sponge-like, brittle structure at the surface of the film, with the ion irradiation damage region extending â¼4 µm in depth. TEM images showed the brittle structure consists of amorphous carbon forming between nanotubes. The significant enhancement of mechanical properties of the irradiated sample studied by the cyclic nanoindentation with a flat punch indenter was observed. Irradiation on the VACNT film made the structure stiffer, resulted in a higher percentage recovery, and reduced the energy dissipation under compression. The results are encouraging for further studies which will lead to create a class of materials-ion-irradiated VACNT films-which after further research may find application in storage or harvesting energy at the micro/nanoscale.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Nanotechnology
Año:
2020
Tipo del documento:
Article
País de afiliación:
Polonia